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Hi Ed, I had same problem with my QCX Mini 20 meter. The number of spots I was getting was very low and all showed a drift of 4 Hz. I think anything greater than 4 Hz results in a no receive. I tried

Hi All... Am enjoying my recently built QDX, awesome little rig! Have been playing around with a few things, and in looking around,? noticed a couple of error message like things in the WSJT-X

I simply found for my 80m qcx plus it had way too much audio. So I added resistance to decrease its audio gain. It works, I can still copy weak signals. If I had to have agc in a plus I would homebrew

John, just thought but have you tried a different PSU to your QDX. I did have a few issues at start up on my QDX when I had the current limit too low on mine. 73 Ken g4apb

OK John, fight down the panic, think logically, gets you there:-) 73 Alan

Hi Alan, Our posts crossed in the ether. ?Thanks for your comments. ?Indeed, L9 had failed open - 0V on one side and 4.8V on the other. ?I removed it from the board and it was open. ?I’ll find a

Vcc(9.4V) with 20m deselected (OFF), which is also as expected. John, Then they are not connected to L9. L9 is 0 volts both sides? Most likely is bad soldering of L4, L10. Is there 0 volts each end of

An update - a bit of probing around the 20m LPF and I discovered that L9 had failed open. ?With 20m ON, the voltage on one side was zero volts and on the other side of L9, 4.8V. ?In circuit testing

Hello, I completed the QDX, but ran into issues when trying to get it to talk to my computers. * I tried *3 different computers* , *2 different USB cables* , *WIndows 10* and *Linux Mint.* *

Hi Phil I'd like the QDX...

Evan, Many thanks for your suggestions. ?Here’s what I’ve found: With 20m selected, the cathode voltages for both D3 and D6 are 4.8V, rather than zero volts, so there’s something very odd here.

It is a pretty simple example of AGC, but the board is inexpensive and your ears will be a lot happier for having it. It's a breeze to install too, with the latest QCX+ revisions anyhow. No intricate

This is by far the best way. Receive WSPR, get to know it. Remove the RX antenna then it will monitor your own transmission, you can see what happens. Exact frequency, timing, drift all easily

WSPRNET shows in about 30-45 seconds as it takes time from a station hearing you, his Internet’s lag time and so down the line. Some spots come in .longer. I have been following this thread and

Thanks, but it will not take [blank]WA7EM. It will take WA7EM{blank} and it will take WA7EMM. I discovered the oscillator calibration steps 8.11 and 8.12. I did them and seemed to work as documented.

I bought a used QCX some time back.. .and after a bit did the most recent mods to date for it. At the beginning of the Pandemic I bought an unbuilt kit and again built is to the mods as of the date..

I just made the prototype for my V2 key. :) I am waiting on magnets and will have a few for sale the beginning of September. -- Colin Kaminski - K6JTH https://www.qsl.net/k6jth/

The QCX minis have been sold. QDX V3 still available.

Sorry Byron. My mistake I misread your call. Anyway Hans did a good job in explaining call sign entry. Probably it is freq. related. The GPS should calibrate the QCX. But it takes one frame. After the

I bought one of those last year, for $18 on eBay. I didn't have high hopes for something built so cheaply, but it's proven to be remarkably useful! Basically, just connect any part and it tells you